Topic: equilibrium constant question (Read 240 times)

The question : Contain SO2 1 mole, O2 2 moles, SO3 0.5 mol in a close system size 5.0 dm3Which occurs this reaction 2SO2​ + O2 2SO3 when the system is in equilibrium state, there are SO3 40% by moles. Find out equilibrium constant (k)